A Google Account is a user account that is required for access, authentication and authorization to certain online Google services. It is also often used as single sign on for third party services. Usage A Google Account is required for Gmail, Google Hangouts, Google Meet and Blogger. Some Google products do not require an account, including Google Search, YouTube, Google Books, Google Finance and Google Maps. However, an account is needed for uploading videos to YouTube and for making edits in Google Maps. YouTube and Blogger maintain separate accounts for users who registered with the services before the Google acquisition. However, effective April 2011 YouTube users are required to link to a separate Google Account if they wish to continue to log into that service. Google Account users may create a publicly accessible Google profile, to configure their presentation on Google products to other Google users. A Google profile can be linked to a user's profiles on various social-networking and image-hosting sites, as well as user blogs. Third-party service providers may implement service authentication for Google Account holders via the Google Account mechanism. Security While creating a Google account, users are asked to provide a recovery email address to allow them to reset their password if they have forgotten it, or if their account is hacked. In some countries, such as the United States, the United Kingdom and India, Google may also require one-time use of a mobile phone number to send an account validation code by SMS text messaging or voice message when creating a new account. Google also offers a two-step verification option—for additional security against hacking—that requests a validation code each time the user logs into their Google account. The code is either generated by an application ("Google Authenticator" or other similar apps) or received from Google as an SMS text message, a voice message, or an email to another account. Trusted devices can be "marked" to skip this 2-step log-on authentication. When this feature is switched on, software that cannot provide the validation code (e.g. IMAP and POP3 clients) must use a unique 16-character alphanumeric password generated by Google instead of the user's normal password. Users who seek an even higher level of security protection, including users whose accounts could be attractive targets for hackers, such as celebrities, politicians, journalists, political activists and wealthy individuals, can opt-in to Google's Advanced Protection Program. This program requires the